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15x=4x+3500
We move all terms to the left:
15x-(4x+3500)=0
We get rid of parentheses
15x-4x-3500=0
We add all the numbers together, and all the variables
11x-3500=0
We move all terms containing x to the left, all other terms to the right
11x=3500
x=3500/11
x=318+2/11
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